Re: [PATCH v2 5/5] doc: admin-guide: Update libata kernel parameters

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On 4/25/22 10:34, Damien Le Moal wrote:
> Cleanup the text text describing the libata.force boot parameter and
> update the list of the values to include all supported horkage and link
> flag that can be forced.
> 
> Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx>
> ---
>  .../admin-guide/kernel-parameters.txt         | 71 ++++++++++++++-----
>  1 file changed, 55 insertions(+), 16 deletions(-)

Jonathan,

Are you OK with these changes ? Will you take this patch or should I keep
it with the series in the libata tree ? Either way work for me.

Thanks !

> 
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 3f1cc5e317ed..00fb37cab649 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -2622,14 +2622,14 @@
>  			when set.
>  			Format: <int>
>  
> -	libata.force=	[LIBATA] Force configurations.  The format is comma-
> -			separated list of "[ID:]VAL" where ID is
> -			PORT[.DEVICE].  PORT and DEVICE are decimal numbers
> -			matching port, link or device.  Basically, it matches
> -			the ATA ID string printed on console by libata.  If
> -			the whole ID part is omitted, the last PORT and DEVICE
> -			values are used.  If ID hasn't been specified yet, the
> -			configuration applies to all ports, links and devices.
> +	libata.force=	[LIBATA] Force configurations.  The format is a comma-
> +			separated list of "[ID:]VAL" where ID is PORT[.DEVICE].
> +			PORT and DEVICE are decimal numbers matching port, link
> +			or device.  Basically, it matches the ATA ID string
> +			printed on console by libata.  If the whole ID part is
> +			omitted, the last PORT and DEVICE values are used.  If
> +			ID hasn't been specified yet, the configuration applies
> +			to all ports, links and devices.
>  
>  			If only DEVICE is omitted, the parameter applies to
>  			the port and all links and devices behind it.  DEVICE
> @@ -2639,7 +2639,7 @@
>  			host link and device attached to it.
>  
>  			The VAL specifies the configuration to force.  As long
> -			as there's no ambiguity shortcut notation is allowed.
> +			as there is no ambiguity, shortcut notation is allowed.
>  			For example, both 1.5 and 1.5G would work for 1.5Gbps.
>  			The following configurations can be forced.
>  
> @@ -2652,19 +2652,58 @@
>  			  udma[/][16,25,33,44,66,100,133] notation is also
>  			  allowed.
>  
> +			* nohrst, nosrst, norst: suppress hard, soft and both
> +			  resets.
> +
> +			* rstonce: only attempt one reset during hot-unplug
> +			  link recovery.
> +
> +			* [no]dbdelay: Enable or disable the extra 200ms delay
> +			  before debouncing a link PHY and device presence
> +			  detection.
> +
>  			* [no]ncq: Turn on or off NCQ.
>  
> -			* [no]ncqtrim: Turn off queued DSM TRIM.
> +			* [no]ncqtrim: Enable or disable queued DSM TRIM.
> +
> +			* [no]ncqati: Enable or disable NCQ trim on ATI chipset.
> +
> +			* [no]trim: Enable or disable (unqueued) TRIM.
> +
> +			* trim_zero: Indicate that TRIM command zeroes data.
> +
> +			* max_trim_128m: Set 128M maximum trim size limit.
> +
> +			* [no]dma: Turn on or off DMA transfers.
> +
> +			* atapi_dmadir: Enable ATAPI DMADIR bridge support.
> +
> +			* atapi_mod16_dma: Enable the use of ATAPI DMA for
> +			  commands that are not a multiple of 16 bytes.
> +
> +			* [no]dmalog: Enable or disable the use of the
> +			  READ LOG DMA EXT command to access logs.
> +
> +			* [no]iddevlog: Enable or disable access to the
> +			  identify device data log.
> +
> +			* [no]logdir: Enable or disable access to the general
> +			  purpose log directory.
> +
> +			* max_sec_128: Set transfer size limit to 128 sectors.
> +
> +			* max_sec_1024: Set or clear transfer size limit to
> +			  1024 sectors.
>  
> -			* nohrst, nosrst, norst: suppress hard, soft
> -			  and both resets.
> +			* max_sec_lba48: Set or clear transfer size limit to
> +			  65535 sectors.
>  
> -			* rstonce: only attempt one reset during
> -			  hot-unplug link recovery
> +			* [no]lpm: Enable or disable link power management.
>  
> -			* dump_id: dump IDENTIFY data.
> +			* [no]setxfer: Indicate if transfer speed mode setting
> +			  should be skipped.
>  
> -			* atapi_dmadir: Enable ATAPI DMADIR bridge support
> +			* dump_id: Dump IDENTIFY data.
>  
>  			* disable: Disable this device.
>  


-- 
Damien Le Moal
Western Digital Research



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